219 citations
- Institute for Research in Fundamental SciencesIR60 papers
- Institute for Advanced Studies in Basic SciencesIR34 papers
- Sharif University of TechnologyIR19 papers
- University of TehranIR18 papers
- Shahid Beheshti UniversityIR11 papers
- Centre National de la Recherche ScientifiqueFR7 papers
- Keele UniversityGB7 papers
- Chinese Academy of SciencesCN6 papers
- International Center for Relativistic AstrophysicsIT6 papers
- Islamic Azad University North Tehran BranchIR6 papers
- University of MazandaranIR6 papers
- Collurania Teramo ObservatoryIT5 papers
7 papers · 1 filter
On swimmer's strategies in various currents
Amir Aghamohammadi, Cina Aghamohammadi, Saman Moghimi-Araghi
Finding an optimum strategy to reach a certain destination by swimming in a background flow is an interesting question which leads to non-trivial results and swimming paths. Here w…
Relativistic frequency shifts in a rotating waveguide
M. Khorrami, A. H. Fatollahi, A. Shariati
A photon source is located in a rotating waveguide. An absorber with a sharp absorbing frequency absorbs some of the emitted photons. This decreases the number of photons which are…
Closedness of orbits in a space with SU(2) Poisson structure
Amir H. Fatollahi, Ahmad Shariati, Mohammad Khorrami
The closedness of orbits of central forces is addressed in a three dimensional space in which the Poisson bracket among the coordinates is that of the SU(2) Lie algebra. In particu…
A suspended rope wrapped around a cylinder
Mohammad Khorrami, Amir Aghamohammadi
The problem of a suspended rope wrapped around a fixed cylinder is studied. If the suspension force is larger than a certain threshold (which is larger than the weight of the rope)…
The point of departure of a particle sliding on a curved surface
Amir Aghamohammadi
A particle is thrown tangentially on a surface. It is shown that for some surfaces and for special initial velocities the thrown particle leaves immediately the surface, and for sp…
Slipping and Rolling on an Inclined Plane
Cina Aghamohammadi, Amir Aghamohammadi
In the first part of the article using a direct calculation two-dimensional motion of a particle sliding on an inclined plane is investigated for general values of friction coeffic…